How to access WCF service in sharepoint using ECMA Script

Hi, 

following is sample code. 

$.ajax({
                url: "URL OF WCF SERVICE",
                type: "POST",
                data: Data,
                async: true,
                success: gotResult,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                processdata: true,
                error: function ServiceFailed(result) {
                    alert(errorMsg.innerHTML);
                }
            });

function gotResult(content, txtFunc, xhr) {
    if (content) {
      //Content processing
        }
    }
}

Here,
Data : Inputs if WCF service requires

gotResult: Function. get called if WCF service is successfully get called. Result comes in "Content" field.

I hope this will help you. Please let me know in case more details are required.